package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品
     * @param dishDTO
     * @return
     */
    @Override
    @Transactional //这里需要操作两张表 需要加事务注解 保证全部成功或全部回滚
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //操作菜品表
        dishMapper.insert(dish);

        //获取菜品id
        Long dishId = dish.getId();

        //操作口味表
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            //将获取到的菜品id设置到口味表中
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize()); //设置查询分页信息
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     * @return
     */
    @Override
    @Transactional //这里需要操作两张表 需要加事务注解 保证全部成功或全部回滚
    public void deleteBatch(List<Long> ids) {
        //判断ids中是否有起售中的菜品
        for(Long id : ids){
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){ //起售中的菜品
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断ids中是否有和菜品关联的套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
        dishMapper.deleteDishByIds(ids);

        //删除口味表中的数据
        dishFlavorMapper.deleteByFlavorIds(ids);
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    @Transactional //这里需要操作两张表 需要加事务注解 保证全部成功或全部回滚
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品表
        Dish dish = dishMapper.getById(id);

        //查询口味表
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO(); //创建一个新的vo
        //赋值
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    @Transactional //这里需要操作两张表 需要加事务注解 保证全部成功或全部回滚
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish); //拷贝DTO的数据到dish对象中
        //修改菜品表
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //添加新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            //将获取到的菜品id设置到口味表中
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public void setStatus(Integer status, Long id) {
        dishMapper.setStatus(status,id);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
